1600x1600mm assembled sliding pvc window with 4+12+4 double glass Winlife s7700 series sliding window designed to cover wide door and window spaces, enable you to have desired views by double, triple and quadruple sash openings provided by special rail system which works without any problem. Horizontal moving door and window sashes let you enjoy unimaginable wide spaces in your living areas... 1. 75 mm special frame profile width. 2. Special brush seals with nylon membranes provide a superior insulation between frame and sash. 3. Adjustable special wheels make sashes move on the rails on the frame easily. 4. Water drainage chambers are designed to enable an easy water flow inside profiles. 5. Glazing beads have inclined inner surfaces. 6. Single or double glazing ranging in width from 5 mm to 22 mm may be used. Standard export packing